1123144221 has 16 divisors (see below), whose sum is σ = 1512272448. Its totient is φ = 741417600.

The previous prime is 1123144189. The next prime is 1123144223. The reversal of 1123144221 is 1224413211.

It is not a de Polignac number, because 1123144221 - 2⁵ = 1123144189 is a prime.

It is a super-2 number, since 2×1123144221² = 2522905882331393682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123144223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169786 + ... + 176276.

It is an arithmetic number, because the mean of its divisors is an integer number (94517028).

Almost surely, 2^1123144221 is an apocalyptic number.

It is an amenable number.

1123144221 is a deficient number, since it is larger than the sum of its proper divisors (389128227).

1123144221 is a wasteful number, since it uses less digits than its factorization.

1123144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7052.

The product of its digits is 384, while the sum is 21.

The square root of 1123144221 is about 33513.3439244728. The cubic root of 1123144221 is about 1039.4697188767.

Adding to 1123144221 its reverse (1224413211), we get a palindrome (2347557432).

The spelling of 1123144221 in words is "one billion, one hundred twenty-three million, one hundred forty-four thousand, two hundred twenty-one".